Which of the following is NOT correct with reference to delta-star type distribution transformers application?
In a delta-star transformer, the secondary voltage is not in phase with the primary voltages due to the difference in winding connections. The delta connection on the primary side creates a phase shift, resulting in the secondary voltage lagging the primary voltage by 30 degrees. This phase difference is a key characteristic of delta-star transformers.
What is the voltage regulation of a transformer while supplying a current of 10 A at 480 V, at a power factor of 0.8 lag , if the equivalent resistance and reactance of the transformer referred to the secondary of a single-phase transformer is 0.6Ω and 0.8Ω respectively?
Which of the following is NOT correct with reference to delta-star type distribution transformers application?
At 400 V and 50 Hz, the total core loss in a transformer is 2400 W. When the transformer is supplied at 200 V, 25 Hz, the core loss is 800 W. Find the hysteresis loss at 400 V, 50 Hz.
A 3300I250 V, 50 Hz transformer has 75 turns on low voltage winding. Find the number of turns on high voltage winding.
1 kVA, 230 kVA, 50 Hz, single phase transformer has an eddy current loss of 30 W. The eddy current loss when the transformer is excited by a DC source of same voltage will be:
A 10 kVA 500/100 V transformer has the resistance referred to primary is 0.3 Ω. The equivalent resistance of transformer referred to secondary is:
